Chair for supporting reinforcing-bars in concrete.



- APPLIOATIONIILED 13120.15, 1910.

Patented Apr. 15, 1913.

TM-#907 Ji'nrA/r PATENT curios.

GEORGE E. SCI-IOENTHALER, OF ST. LOUIS, MISSOURI.

CHAIR FOR, SlIPIEORTING REINFORCING-IBARS IN CONCRETE.

Specification of Letters Patent. Paten t gd Apr; Ell

Application filed'December 15, 1910. Serial 110. 597,510.

T 0 all whom it may concern;

Be it known that I, Gsonon R. SCHOEN- 'rnALnn, a citizen of the United States, residing at St. Louis, Missouri, have invented a certain new and useful Improvement in Lhairs for Supporting Reinforcing-Bars in tloncretc, of which the following is a. full,

- clear, and exact description, such as will enable others skilled in theartto which it appertains to make and use the same, reference being had to the accompanying drawings, forming part of this specification, in Which- 7 Figure l is a perspective view of one of" myimproved chairs for supporting the reinforcing bars of concrete construction. Fig. 2 1s a sectional new 01 the chair embedded no a portion of concrete, andsupporting a reinforcing bar. Fig. 3 is a perspective View of a modified form of my improved chair. Fig. l is a sectional view of the modified form of the chair embedded in a body of concrete, and supporting a pair of reinforcing rods. Fig. is a perspectiveview of a modified form of the chair.-

My invention relates generally to reinforced concrete construction and more particularly to a simple supporting chair for the metal rods utilized for reinforcing concrete floors or like structures, which ,are laid or arranged substantially in a horizontal distributed noon the tem orar floorin T the above purposes my invention-con sists in certain novel features of construction hereinafter more fully described and claimed.

As illustrated in Figs. 1 and 2' the preferred form. of my improved supporting chair is formed of a single piece of sheet metal 1, rectangular in outline, and formed in the center tLe-reof is a slot or elongated opening 2. The sectionof metal thus formed is bent transversely at its center into the form of an inverted V, thereby providing a pair of legs 3, the lower ends of which-rest upon the temporary flooring or form when the device is in use. I The ends of the slot or opening 2 extend downward in the central portions of the legs 3, thereby forming a pair of U-shaped seats 4 for the metal reinforcing rods 5. d

When the reinforcing rod is positioned on the supporting chair, the upper edges of the metal around the seats 4 at the ends of the slot or opening 2' tend to bite into the metal reinforcing rods thereby effectually holding said rods against longitudinal movement, while the concrete is being poured over and around said rods. a l/Vhere a series of reinforcing rods are arranged at rightangles to one another, and. it is desired to tiethe upper series of rods, I make use of a chair of the form shown in Figs. 3 and 4;. In this form of chair an up- Wardly projecting leg 6 is formed integral with one end of the section of material form- I ing the chair proper, and the upper portion of this upstanding leg is slotted as designated by 7. When this type of chair is employedthe upper ends of the portions of. the legs 6 at the sides of the slot 7 are bentaround the reinforcing rods 8, which are laid upon the main rods 5. (See Fig. 4:).

As hereinbefore stated the edges of the metal around the seats 8 engage and hold the reinforcing rod 5, and tend to prevent lon gitudinal shifting movement of the same at the time the concrete is poured over and around the rods, and in a like manner the lower edges of the inclined legs 3 bite into and engage the false flooring or support which is usually of wood, thereby eilectually anchoring the supporting chairs and tending to hold the same against accidental displacement.

The lower ends of the legs 3 of the chair may, if desired, be notched or cut away as shown in Fig. l, and such construction per- -mits the concrete to readily flow into the Iii-desired keys A can be inserted between the upper portions of the chairs, and the reinforcing rods as shown 1n Figs. 1, 2 and I 4:, and by such arrangement the chairs and reinforcing rods are locked to one another.

Supporting chairs of my improved construction are simple, strong and durable,- can be made in various sizes to accommodate reinforcing rods of difierent diameters, and

said chairs can be very cheaply produced, in-

asmnch, as they can be readily stamped from large sheets of metal and bent into shape at I the same time they ,are stamped out.

It will be readily understood that minor changesin the form, size and construction of my improved chairs for supporting rein; forcing bars, may be made and substituted concrete construction comprising a metal plate bent transversely at its center into inverted V-shape so as to form a pair of inclined legs, the lower ends of which are notched, which plate is provided With a centrally disposed longitudinally extending opening, the end portions of which extend downward in the inclined legs to form a pair of seats for the reinforcing rod, the seats'at the-ends of the opening being provided with sharp edges which engage the surface of the reinforcing rod to hold the same against longitudinal movement before said rod and the supporting bar are embedded in the body of concrete.

2. The hereindescribed chair for support:- ing horizontally disposed reinforcing bars in concrete construction comprising a metal plate bent transversely at its center into inverted V-shape so as to form a pair of inclined legs, the lower ends of which are notched, which plate is provided with a centrally disposed longitudinally extending opening, the end portions of which extend downward in the inclined legs to form a pair of seats, for the reinforcing rod.

Y In testimony whereof I hereunto atiix my signature in the presence of two witnesses, this 21st day of November 1910.

GEORGE R. SCHOENTHALER. lVitnesses M. P. SMITH,

ALMA GEBHART. 

